GA Dollar $ Index
If you want your Adwords advertising to be successful, you should consider using the Dollar Index ($ Index) metric available in your Google Analytics account (content section). The Dollar Index metric tells you how much every page on your website contributed to your revenue. Itβs calculated by first calculating the total revenue generated by users to that page and then dividing that by the total number of views of that page.
Dollar $ Index Optimisation
Find the highest $ Index pages on your site and consider adding them to your adwords campaigns. You may find valuable destination pages buried somewhere deep in your site, which have never been used before. By implementing those pages to your adwords campaigns, you can dramatically increase the number of pages viewed per visit and also identify hidden content that can maximise your ROI and boost your online sales.

Sayβs
Great Advice,
Actually i was really not aware about Landing Page Optimisation Tip.if you want your Adwords advertising to be successful, you should consider using the Dollar Index metric available in your Google Analytics account.you explain very comparetatively.and so helpful. its a very interesting and a tricky for a seo person.Thanks a lot………….. for sharing this post.